Overview
When a negative adverbial expression begins a sentence, the subject and auxiliary verb are inverted for emphasis. Example: Never have I seen such a performance. Not only did she win, but she also broke the record. This structure is used in formal and literary English.
Common Patterns
- NeverNever have I seen such a sight.
- RarelyRarely does she leave before midnight.
- Not onlyNot only did he fail, but he also cheated.
- No soonerNo sooner had I arrived than it started raining.
Inversion Triggers
- Negative adverbs: never, rarely, seldom, hardly, barely, scarcely
- Not + phrase: not only, not until, not once, not since
- Only: only then, only when, only after, only by
- Pattern: adverbial + auxiliary + subject + verb
Common Mistakes
- ❌ Never I have seen → ✅ Never have I seen
- ❌ Not only he won but... → ✅ Not only did he win...
- ❌ Hardly I had sat → ✅ Hardly had I sat down when...
When to use
Formal writing
Never before had the country faced such a crisis.
Rhetoric
Not only did she win, but she broke the record.
Literary style
Rarely does a book leave such a lasting impression.
Sequence
No sooner had the alarm sounded than they evacuated.